Why? If you’re like me, you might not be in 100% agreement with how MusicBrainz represents the match metadata; and -t will ask for confirmation which you can either accept ([Enter] or A) or reject (U for ‘Use as-is’).

If the first few matches are fine, you can drop the flag; if not, you can figure out how to finesse it to import files to your liking via beets‘s excellent plugins.